Internally fired gas burner with interconnecting flash tubes and safety cutoff



g- 1951 c. E. FITZGERALD 2, 63,230

INTERNALLY FIRED GAS BURNERS WITH INTERCONNECTING FLASH TUBES AND SAFETYCUT OFF Filed May 1a, 1948 v INVENTOR. CARL E..FITZGERQLQ I W e: that-n1Paient dee 57,. 19st INTERNALLY FIRED GAS BURNER WITH INTERCONNECTINGFLASH TUBES AND SAFETY CUTOFF Carl E. Fitzgerald, Chicago, Ill.,assignor to Buronset, f

dett Manufacturing Company, Chicago, 11]., a corporation of DelawareApplication May 18, 1948, Serial No. 27,750

4 Claims. 158-1171) This invention relates to combustion apparatus ofthe type employing a combustible gaseous fuel, such as a mixture ofhydrocarbon gas and air, the apparatus consisting of a series of iningthe time it is energized. The confronting side 2 walls of the burnerbodies ar formed with openings 22.

In the burner structure illustrated, these openings are in the form ofnotches formed in the side diVidual burners arranged in a combustionchami walls of the bodies, with the bottom wall 23 of her. Often thecombustion chamber is of conth openings arranged tangential to thebottom siderable size extending sev al feet n length as, curvature ofthe concave surface II, or forming f r mpl in o s f r yi coatingsapplied a continuation thereof. An ignition tube 24, to automobilebodies and the like. such arrangepreferably formed of refractorymaterial, i ments pr s t a d fl ult situati in r sp to rangedintermediate the burners with the ends t n igniting the u s It isessential of the tubes arranged in registration with the that all f thur be quickly ignited. a openings 22. The tubes 24 have an internal diify of the burners fail to ignite, it s mp ameter at least equal to thedepth of the opentant that t supply of m us be shut cu. ings 22. Thetubes are supported and maintained Otherwise, e unburned gas d a mixturein place by a yoke formed of sheet metal memcu t in the combustionchamber will bers having a portion 25 encircling the burner sult in anexplosion of considerable magnitude. body, nd end portions 28 arrangedon opposite This nv n has as an Object a combustion sides of the tubes24 and contracted against the apparatus wherein the individual burnersare suctubes by clevis members 21 nd b lts 23. cess v y g this ignitiontaking place n- With this construction, the burners may be y and e app us means y, arranged at any convenient spacing along the i the event yburner in the series fails to supply manifold l0, and the tubes 24 cutto the nite. the supply combustible will be shut desired length so thatthe nds of the tubes will The invent o co s in the novel features bearranged in juxtaposition to the sides of the and in the combinationsand constructions here- 25 burner bodies Th arrangement for lighting theinafter set fo and claimedburners is shown diagrammatically in Figure 1In describing this invention, reference is had and includes an igniter 3arranged in t tct e cc p y g drawings in which like charsition to aburner at one end of the series. A acters designate correspo D all thethermostat 3| is arranged in heat exchanging views. relation to theburner at the opposite end of the ure 1 s a p p w Of a combustionseries. The igniter 30 is operable, when enerpp us embo y y invention.gized, to ignite combustible gas in the burner Figure 2 s a sectional wtaken on line employing an electric spark for this purpose, as Figurewill be well understood. The igniter is energized Figure 3 s a Viewtaken on line Figure by a, manually operable switch 32 which, when Fiure 4 is a sectional view taken on line ll, actuated to the on position,completes a circuit Figure from the supply line to the igniter. This isThis apparatus consists o a gas supply meuibrought about by the movablecontact as bridgfold In on which there is mounted a series of ining ta t34, 35, leting a circuit from the dividual burners. These burners eachconsist of t i 35 of th l line to the igniter a p shaped body formed ofrefractory material through wire 31. The igniter is connected to thewith an annular concave burning surface H. The common i 33 of th supplythrough wire 39. bod es a provided h a central aperture to Actuation ofthe switch 32also efiects energizareceivea hollow stem l2 threaded intoa shoult f Solenoid 49 i t d ith th supply dered sleeve I 3 which, inturn, is threaded into valve 2L This is brought about by th movable thema fo d The p r end of e stems contact bridging the contacts.42,-43,connecting I2 is formed with a head portion l4 coope able the hot side36 of the line to the solenoid 40 with an a justable baffle IE to directthe combustithrough wire 44. The opposite side of the soleble mixturedownwardly and across t e curv noid is connected to the .common return38 or concave burner surface ll.- These burners are 50 thrpugh wir 45,Accordingly, the valve 2! is 01 the type disclosed in the Burdett.PatentN0. open to supply the combustible gas fuel to the 1,959,456. Themanifold I0 is connected to a supburners through the manifold l0 andsimulply pipe 20 through a solenoid operated valve 2|. taneously, theigniter 30 is energized, lighting the This valve is normally closed andis opened durfirst burner of the series. As soon as the manifold I0 isconnected to the supply pipe 20, gas

is supplied to all of the burners and is directed in both ends of eachof the ignition tubes ll, whereupon these tubes are quickly filled withgas and the burners become successively ignited, as will be wellunderstood. This ignition of all the burners takes place almostinstantly, whereupon the switch 32 is released. The contacts of thethermostat 3| become closed as the last burner of the series is ignitedand establish an operating circuit to the solenoid 40, the thermostatbeing connected to the supply 35, through wire 41, and to the solenoidthrough wire 48.

With this arrangement, if any of the burners in the series do notignite, the remaining burners of the series will not ignite, and thecontacts in the thermostat it will not close. Accordingly, upon releaseof the manually operable switch 32, the solenoid will be deenergizcd andthe supply to all the burners will be shut off. The operator is thusinformed ofthe existence of a defect in the combustion apparatus, andcan proceed to remedy the trouble. This prevents a portion of the seriesof burners being operated and accordingly, the excess accumulation ofunburned gas from the burners that have not been ignited.

I am aware of the fact-that gaseous fuel burners have heretofore beenignited through the use of an ignition tube, or flash tube. However, inmy apparatus, I arrange the burners in a series arrangement, whereby gasis supplied to the ignition tubes at both ends thereof. This, coupledwith the fact that the tubes are of large diameter, results in the tubesbeing quickly and completely filled with gas, and in prompt ignitionthrough the tubes from one burner to the next.

What I claim is:

i. A combustion apparatus comprising a gas supply manifold, a pluralityof gas burners mounted in spaced relation on said manifold, each of saidburners comprising an annular wall structure forming an upwardly concavecombustion surface and a gas conducting passage communicating with saidmanifold and having an upwardly directed discharge outlet through thecenter of said combustion surface, a bailie arranged in juxtaposition tosaid discharge outlet and operable to direct gas outwardly from saidoutlet across saidconcave surface, the confronting sides of each of saidannular wall structures being formed with an opening, the bottom portionof which is arranged tangential to the bottom of said concave surface, atubular flame conducting memberextending from one burner to the next,with the ends of the tubes arranged in register with said openings. I

2. A combustion apparatus comprising a gas supply manifold, a series ofgas burners mounted in spaced relation along said manifold, each of saidburners including a cylindrical body having an annular wall structureforming an upwardly concave combustion burner surface, a gas conductingpassage communicating with said manifold and having an upwardly directeddischarge outlet through the center of said concave surface, a bafnemember arranged in juxtaposition to said discharge outlet and beingoperable to direct gas outwardly from said outlet across said concavecombustion surface, the confronting sides of each of said annular wallstructures being formed with openings, a flame conducting tube extendingfrom one burner to the next, and means cooperable with said tubes toposition the ends thereof in registration with said openings.

3. A combustion apparatus comprising a gas supply manifold, a series ofgas burners mounted in spaced relation along the manifold, each of saidburners including a body comprising an annular wall structure forming anupwardly concave combustion surface, a gas conducting passage arrangedin the center of said surface and communicating with said manifold andhaving an upwardly directed discharge outlet through the center of saidsurface, a baiile carried by the body in juxtaposition to said passageand being cooperable to direct gas from said passage outwardlyacross'said .concave combustion surface,

the confronting sides of each of said annular wall structures beingformed with openings, the

bottom wall of said openings being tangential supply manifold,a'solenoid valve operable when energized to connect said manifold to asource of combustible gas, a series of gas burners mounted in spacedrelation along said manifold. each of said burners including a bodycomprising an annular wall structure forming an up-'- wardly concavecombustion burner surface, and a gas conducting communicating with saidmanifold and having an upwardly directed discharge outlet through'thecenter of said concave combustion surface, a balile arranged injuxtaposition to saiddischarge outlet and cooperable to direct gasoutwardly from said outlet across said concave surface, the confrontingsides of each of said annular wall structures being formed withopenings, a tubular flame conducting member extending from one' burnerto the next, with the ends of said tubes being arranged in register withsaid openings, igniter means arranged in proximity to a burner atone endof said series and beingoperable when energised to ignite thecombustible gas in said burner, a thermostat arranged in proximity tothe last burner at the opposite end of said series, a manually actuatedswitch means operable while actuated to closed position to energire saidigniier and solenoid valve, and said thermostat including means tomaintain energization of said valve upon ignition of the said lastburner.

CARL I. FITZGERAID.

BEFEBENCfiS CITED The following references are of record in the file ofthis patent:

. UNITED STATES PATENTS 2,503,260 Apr. 11, 1950

